Sadler is second in the NASCAR Xfinity Series standings; he has finished second in the Xfinity standings four times in the last seven years. He has 13 wins in the series in 383 career starts.

His top sponsor, OneMain Financial, already had said it would not return in the same capacity next season, meaning if Sadler wanted to continue racing, he would have had to land new sponsorship while in the twilight of his career.

Sadler spent 12 full-time seasons in the NASCAR Cup Series for Wood Brothers Racing, Robert Yates Racing, Evernham Motorsports and Richard Petty Motorsports. He has three wins in 438 career starts.